Finding the Fourth Proportional to 1,382.30, 1,906.77 and 884.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.30 : 1,906.77 = 884.76 : x
2. Step 2: Convert to fraction form
   1,382.30/1,906.77 = 884.76/x
3. Step 3: Cross multiply
   1,382.30x = 1,906.77 × 884.76
4. Step 4: Simplify right side
   1,382.30x = 1,687,033.83
5. Step 5: Solve for x
   x = 1,687,033.83/1,382.30
6. Step 6: Final answer
   x = 1,220.45